2001 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2001 Audi A6 has 5 documented known issues, with 1 rated critical. The most serious is 2.7T Turbocharger Oil Supply/Heat-Related Wear Leading to Turbo Failure and Smoke ($2,500-$6,000 repair). Across all issues, repair costs range from $120 to $6,000. DIY maintenance guides at au7o.io.
On the 2000-2004 Audi A6 2.7L twin-turbo V6, the 2.7T V6 used in A6 2.7T models is well known for ignition coil pack failures that cause sudden misfires, rough running, and loss of power. This issue was widespread across many early-2000s Audi/VW turbo models and generated numerous owner complaints and service actions. Failures may occur one cylinder at a time or in repeated succession as the coils age.
Scan for cylinder-specific misfire faults, inspect spark plugs, and swap suspect coils to confirm the fault follows the coil. The standard repair is replacement of the failed coil packs; many owners replace the full set and install updated revision coils. Spark plugs should be checked or replaced at the same time if worn or fuel-fouled.
Parts and tips from 0+ owners who fixed this issue
On the 2000-2004 Audi A6, a common C5 A6 problem is failure of the Bosch ABS control module due to internal solder-joint or circuit-board faults. Owners report the ABS light, BRAKE warning, and sometimes traction/stability warnings illuminating intermittently or permanently, often after heat cycling. In many cases the hydraulic unit is fine and only the electronic module fails.
Scan the ABS system for communication or wheel-speed related faults and verify power, ground, and wheel-speed sensor inputs before replacing parts. Many owners repair the issue by sending the ABS module out for rebuild or replacing it with a remanufactured unit, then coding it if required. If wheel-speed sensor faults persist after module repair, sensor and harness checks are needed.
Parts and tips from 0+ owners who fixed this issue
On the 2000-2004 Audi A6, the C5 A6 uses a multi-link aluminum front suspension with multiple upper and lower control arms whose ball joints and bushings commonly wear out, especially on rough roads or higher-mileage cars. Owners frequently report front-end clunking over bumps, wandering steering, vibration, and uneven inner-edge tire wear. This is one of the most commonly discussed C5 chassis wear items across owner forums and repair databases.
Diagnosis usually involves checking for play in the upper and lower control arm ball joints, torn bushings, and worn tie-rod ends with the suspension loaded. The durable repair is replacement of the failed arms, and many owners replace the full front control-arm kit at once followed by a four-wheel alignment. Tie rods and sway-bar links are often inspected or replaced at the same time.
Parts and tips from 0+ owners who fixed this issue
On the 2000-2004 Audi A6, the C5 A6 instrument cluster is known for failing LCD pixels in the center display and, in some cases, intermittent gauge or warning-light behavior. Owners report unreadable driver information displays, missing segments, dim or blank screens, and occasional cluster resets. Heat and age-related deterioration of the display ribbon and cluster electronics are common causes.
Confirm battery voltage and charging system health first, then inspect for cluster-specific faults using a scan tool. Repairs typically involve cluster rebuild services, LCD ribbon/display replacement, or replacement and immobilizer adaptation of the cluster. Because odometer and immobilizer data are involved, specialist repair is often preferred.
Parts and tips from 0+ owners who fixed this issue
FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY
VOLKSWAGEN IS RECALLING CERTAIN MODEL YEAR 2001-2004 AUDI A6, MODEL YEAR 2002-2003 S6 AND MODEL YEAR 2003 RS6 VEHICLES EQUIPPED WITH 4.2L ENGINES AND MANUFACTURED FROM JUNE 19, 2001, THROUGH JUNE 8, 2004. THE AGING OF THE PLASTIC MATERIAL IN THE FUEL TANK ROLLOVER VALVE COMBINED WITH BENDING STRESS FROM THE ALUMINUM VENTILATION LINE TO THE ROLLOVER VALVE NIPPLE MAY LEAD TO CRACKING OF THE NIPPLE. IF THIS HAPPENS, A FUEL LEAK MAY RESULT.
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
VOLKSWAGEN IS RECALLING 68,240 MY 2001-2004 AUDI A6 QUATTRO VEHICLES EQUIPPED WITH 2.7L, 2.8L, OR 3.0L ENGINES AND MY 2001-2005 ALLROAD QUATTRO VEHICLES EQUIPPED WITH 2.7L OR 4.2L ENGINES. THE AGING OF THE PLASTIC MATERIAL IN THE FUEL TANK ROLLOVER VALVE COMBINED WITH BENDING STRESS FROM THE ALUMINUM VENTILATION LINE TO THE ROLLOVER VALVE NIPPLE MAY LEAD TO CRACKING OF THE NIPPLE. IF THIS HAPPENS, A FUEL LEAK MAY RESULT.
ELECTRICAL SYSTEM
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH HALOGEN LOW BEAM HEADLIGHTS, CERTAIN CONNECTOR PINS IN THE HEADLIGHT SWITCH CONNECTOR COME INTO CONTACT WITH EACH OTHER CAUSING A SHORT CIRCUIT. NOTE: VEHICLES WITH XENON LOW BEAM HEADLIGHTS ARE NOT AFFECTED BECAUSE THE CIRCUIT IN THESE VEHICLES CONTAINS A FUSE, WHICH PRECLUDES EXCESSIVE CURRENT FLOW IN THE CASE OF A SHORT CIRCUIT. AUDI S6 AND S6 AVANT VEHICLES ARE ALL EQUIPPED WITH XENON LOW BEAM HEADLIGHTS AND, THEREFORE, ARE NOT LONGER AFFECTED BY THIS RECALL.
ELECTRICAL SYSTEM
ON CERTAIN PASSENGER VEHICLES, IF A DRIVER'S KNEES PUSH AGAINST THE KNEE BOLSTER (CRASH ELEMENT) LOCATED UNDER THE DASHBOARD, IT CAN CONTACT THE HEADLIGHT SWITCH WIRING HARNESS, AND AN ELECTRICAL SHORT COULD OCCUR.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Volkswagen Group of America, Inc. (VW) is recalling certain 2000-2001 TT Roadster, 2000 TT Coupe, 1999 Audi A8, 1998-2000 Audi A6, and 1999-2000 Audi A4 vehicles equipped with Non-Azide Driver air bag Inflators (NADI) that do not contain phase stabilized ammonium nitrate (PSAN) propellant. Due to a manufacturing issue, the NADI inflators may absorb moisture, possibly causing the air bag to deploy improperly in the event of a crash.
+ 6 more recalls. Check all on NHTSA.gov
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According to Au7o's analysis of 0+ owner reports, the 2001-2001 Audi A6 has 5 documented issues. The most frequently reported are: 2.7T Turbocharger Oil Supply/Heat-Related Wear Leading to Turbo Failure and Smoke, ABS Module / Electronic Brake Control Module Failure Causing ABS and Brake Warning Lights, 2.7T Ignition Coil Pack Failure Causing Misfires and Flashing Check Engine Light. Of these, 1 is rated critical and should be addressed promptly.
The 2001-2001 Audi A6 has 5 known issues documented across 0+ owner reports. 1 issue is rated critical: 2.7T Turbocharger Oil Supply/Heat-Related Wear Leading to Turbo Failure and Smoke. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Audi A6 issues range from $120 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 2.7T Turbocharger Oil Supply/Heat-Related Wear Leading to Turbo Failure and Smoke, typically costs $2,500-$6,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
On higher-mileage 2.7T A6 models, owners frequently report turbocharger failure from bearing wear, oil coking, or prolonged heat stress. Because the twin turbos are tightly packaged, neglected oil changes or shutdown after hard driving can accelerate wear. Symptoms often begin as… Repairs typically run $2,500-$6,000. Severity: high.
A common C5 A6 problem is failure of the Bosch ABS control module due to internal solder-joint or circuit-board faults. Owners report the ABS light, BRAKE warning, and sometimes traction/stability warnings illuminating intermittently or permanently, often after heat cycling. In m… Repairs typically run $250-$900. Severity: medium.
The 2.7T V6 used in A6 2.7T models is well known for ignition coil pack failures that cause sudden misfires, rough running, and loss of power. This issue was widespread across many early-2000s Audi/VW turbo models and generated numerous owner complaints and service actions. Failu… Repairs typically run $120-$500. Severity: medium.
The C5 A6 uses a multi-link aluminum front suspension with multiple upper and lower control arms whose ball joints and bushings commonly wear out, especially on rough roads or higher-mileage cars. Owners frequently report front-end clunking over bumps, wandering steering, vibrati… Repairs typically run $600-$1,800. Severity: medium.
The C5 A6 instrument cluster is known for failing LCD pixels in the center display and, in some cases, intermittent gauge or warning-light behavior. Owners report unreadable driver information displays, missing segments, dim or blank screens, and occasional cluster resets. Heat a… Repairs typically run $200-$800. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
